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/* -*- c++ -*- */
/*
* Copyright 2007 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef INCLUDED_GMAC_H
#define INCLUDED_GMAC_H
#include <mb_mblock.h>
class gmac;
class gmac : public mb_mblock
{
// The state is used to determine how to handle incoming messages and of
// course, the state of the MAC protocol.
enum state_t {
INIT,
OPENING_USRP,
ALLOCATING_CHANNELS,
INIT_GMAC,
IDLE,
CLOSING_CHANNELS,
CLOSING_USRP,
};
state_t d_state;
// Ports used for applications to connect to this block
mb_port_sptr d_tx, d_rx, d_cs;
// Ports to connect to usrp_server (us)
mb_port_sptr d_us_tx, d_us_rx, d_us_cs;
// The channel numbers assigned for use
pmt_t d_us_rx_chan, d_us_tx_chan;
pmt_t d_which_usrp;
bool d_carrier_sense;
long d_cs_thresh;
long d_cs_deadline;
enum FPGA_REGISTERS {
REG_CS_THRESH = 1,
REG_CS_DEADLINE = 2
};
public:
gmac(mb_runtime *rt, const std::string &instance_name, pmt_t user_arg);
~gmac();
void handle_message(mb_message_sptr msg);
private:
void define_ports();
void initialize_usrp();
void initialize_gmac();
void set_carrier_sense(bool toggle, long threshold, long deadline, pmt_t invocation);
void allocate_channels();
void enter_receiving();
void enter_idle();
void close_channels();
void open_usrp();
void close_usrp();
void handle_cmd_tx_pkt(pmt_t data);
void handle_response_xmit_raw_frame(pmt_t data);
bool carrier_sense_pkt(pmt_t pkt_properties);
void handle_cmd_carrier_sense_enable(pmt_t data);
void handle_cmd_carrier_sense_threshold(pmt_t data);
void handle_cmd_carrier_sense_disable(pmt_t data);
void handle_cmd_carrier_sense_deadline(pmt_t data);
};
#endif // INCLUDED_GMAC_H
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